Oak Ridge Estates I & Ii Water Assoc., OK
Lead detected, under the action levels
Latest 90th-percentile lead: 3.1 ppb (monitoring period 2023-2023). The federal action level is 15 ppb today and drops to 10 ppb in Nov 2027; EPA's health goal is 0. Lead was measured in sampled homes but the 90th percentile is under both action levels. EPA's health goal for lead is zero, so test your own tap if your home was built before 1986 or anyone in it is pregnant or a young child.
Oak Ridge Estates I & Ii Water Assoc. at a glance
Oak Ridge Estates I & Ii Water Assoc. serves about 62 people through 25 service connections, which makes it a very small system under EPA's size classes. It is privately owned and draws groundwater, in Delaware County, Oklahoma. EPA system ID: OK6002173. Ask the utility on your bill for your address in their service line inventory.
Every lead result on file
The highest 90th-percentile result EPA holds for Oak Ridge Estates I & Ii Water Assoc. is 3.1 ppb across 1 monitoring period, none of them over 15 ppb.
| Period ending | 90th-percentile lead |
|---|---|
| 2023 | 3.1 ppb |
How Oak Ridge Estates I & Ii Water Assoc. compares
Of the 870 Oklahoma systems with a lead result, the median latest reading is 0.81 ppb; 6 are over 15 ppb right now and 66 have gone over at some point. Oak Ridge Estates I & Ii Water Assoc.'s 3.1 ppb sits at the 85th percentile in Oklahoma and the 83rd nationally (higher means more lead).
Neighbouring systems
25 other systems share Delaware County; 2 of them have a higher latest lead result than Oak Ridge Estates I & Ii Water Assoc.. If you are unsure which one supplies your house, the name on your water bill decides it.
| System | People | Latest lead |
|---|---|---|
| Grove Municipal Services Auth. | 7,311 | 9.3 ppb |
| Grand Lake Pwa | 2,800 | 3.1 ppb |
| Jay | 2,482 | 0 (not detected) |
| Ketchum Pwa Delaware Co System | 1,805 | 2.3 ppb |
| South Delaware Co Regional Water Auth. | 1,500 | 1.8 ppb |
| Delaware Co Rwd #10 | 1,295 | 1.2 ppb |
| West Siloam Springs | 877 | 1.4 ppb |
| Colcord Pwa | 819 | 0 (not detected) |
| Kansas Public Works Authority | 802 | 0 (not detected) |
| Delaware Co Rwd # 12 | 785 | 0 (not detected) |
What to do in your house
Test your own tap with a certified lab first-draw sample; Afton, OK may offer free or low-cost kits through the utility. If your own line is lead, replacing the private side runs about $1,200-$12,300 (EPA average about $4,700). Ask Oak Ridge Estates I & Ii Water Assoc. whether it covers that cost before hiring anyone - many utilities now do.
These figures describe homes the utility sampled, not your tap. Only your service line record or a test of your own water answers the question for your house. What a 90th-percentile result does and does not tell you: how to read a lead result. Systems that went over once often dip back under; here is what that means.